user manual

ND-20292
CHAPTER 4
APRIL, 1990
440.16 Callback Request Message
1. ToSet:
Upon receiving call waiting tone, busy tone or no answer when
placing an extension call:
l
Dial access code (Default: #).
l Receive confirmation tone and hang up.
NOTE:
Access code must be dialed within a predetermined time after
dialing the extension number.
2. To Cancel:
l Lift handset and receive internal dial tone.
l Redial the extension number.
l Restore handset.
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